1 files changed, 119 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/fmtmoney.c b/reference/C/CONTRIB/SNIP/fmtmoney.c
new file mode 100755
index 0000000..8d9b1ee
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/fmtmoney.c
@@ -0,0 +1,119 @@
+/*
+**  FMTMONEY.C - Format a U.S. dollar value into a numeric string
+**
+**  public domain demo by Bob Stout
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#define Form(s,a) bufptr += sprintf(bufptr, s, a)
+
+static char buf[256], *bufptr;
+
+static char *units[] = {"Zero", "One", "Two", "Three", "Four",
+                        "Five", "Six", "Seven", "Eight", "Nine",
+                        "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen",
+                        "Fifteen", "Sixteen", "Seventeen", "Eighteen",
+                        "Nineteen"},
+
+            *tens[]  = {"Twenty", "Thirty", "Forty", "Fifty", "Sixty",
+                        "Seventy", "Eighty", "Ninety"};
+
+static void form_group(int, char *);
+
+/*
+**  Call with double amount
+**  Rounds cents
+**  Returns string in a static buffer
+*/
+
+char *fmt_money(double amt)
+{
+      int temp;
+      double dummy, cents = modf(amt, &dummy);
+
+      *buf = '\0';
+      bufptr = buf;
+
+      temp = (int)(amt/1E12);
+      if (temp)
+      {
+            form_group(temp, "Trillion");
+            amt = fmod(amt, 1E12);
+      }
+
+      temp = (int)(amt/1E9);
+      if (temp)
+      {
+            form_group(temp, "Billion");
+            amt = fmod(amt, 1E9);
+      }
+
+      temp = (int)(amt/1E6);
+      if (temp)
+      {
+            form_group(temp, "Million");
+            amt = fmod(amt, 1E6);
+      }
+
+      temp = (int)(amt/1E3);
+      if (temp)
+      {
+            form_group(temp, "Thousand");
+            amt = fmod(amt, 1E3);
+      }
+      form_group((int)amt, "");
+
+      if (buf == bufptr)
+            Form("%s ", units[0]);
+
+      temp = (int)(cents * 100. + .5);
+      sprintf(bufptr, "& %02d/100", temp);
+
+      return buf;
+}
+
+/*
+**  Process each thousands group
+*/
+
+static void form_group(int amt, char *scale)
+{
+      if (buf != bufptr)
+            *bufptr++ = ' ';
+
+      if (100 <= amt)
+      {
+            Form("%s Hundred ", units[amt/100]);
+            amt %= 100;
+      }
+      if (20 <= amt)
+      {
+            Form("%s", tens[(amt - 20)/10]);
+            if (0 != (amt %= 10))
+            {
+                  Form("-%s ", units[amt]);
+            }
+                else    Form("%s", " ");
+      }
+      else if (amt)
+      {
+            Form("%s ", units[amt]);
+      }
+
+      Form("%s", scale);
+}
+
+#ifdef TEST
+
+void main(int argc, char *argv[])
+{
+      double amt = atof(argv[1]);
+
+      printf("fmt_money(%g) = %s\n", amt, fmt_money(amt));
+}
+
+#endif